Letterman tells Romney he doesn't hate him for appearing on Leno - then adds dig at old rival

NEW YORK, N.Y. - David Letterman is reassuring Mitt Romney that he doesn't hate him — and getting in a dig at Jay Leno in the process.

The Republican presidential candidate said in a private speech to donors made public this week that Letterman "hates me because I've been on Leno more than him."

Letterman said on the "Late Show" Wednesday that Romney and his wife are welcome on his CBS late-night show. Romney has been on three times but hasn't made any appearances since he became Republican nominee. Democratic President Barack Obama was on Letterman on Tuesday.